Lock.



' P. T. PURDHAM.

LOOK.

APPLIOATION FILED HOV. 20, 1809.

- Patented Oct. 18,1910.

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I u H F. T. PURDHAM. LOCK.

APPLICATION FILED NOV. 20, 1909.

73,30. Patented Oct. 18,1910.

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III/KI IVIAI/IIIIX/I/l Witnesses rear casing plate.

'UNTTE FFTQE.

FOUNTAIN 'I'. PURDHAM, 0F BATTLE CREEK, MICHIGAN.

LOCK.

To all whom it may concern:

Be it known that I, FOUNTAIN T. Pom)- HAM, a citizen of the United States, residing at Battle Creek, Michigan, have invented certain new and useful Improvements in Locks, of which the following is a specification.

This invention relates to improvements in sliding door looks.

The main objects of this invention are, first, to provide an improved sliding door lock which it is quite impossible to disengage through the manipulation of the door and without actuating the bolts. Second, to provide an improved lock for sliding doors having oppositely disposed keeper engaging members. Third, to provide a structure of the class described in which the parts are simple in structure and quickly and easily assembled.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

We accomplish the objects of our invention by the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of our invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure 1 is a side elevation of a structure embodying the features of my invention applied to a door, portions being broken away to show the relation of the parts in use. Fig. 2 is a rear view of my improved lock, the keeper being shown in section. Fig. 3 is a rear view with the rear casing plate removed, and portions of the front casing plate flange broken away. Fig. 1 is a vertical section taken on a line corresponding to line 4l-4L of Fig. 2. Fig. 5 is an inside perspective view of the front casing plate. Fig. 6 is an inside perspective view of the V Fig. 7 is a detail View of a modified construction, a knob being provided for actuating the bolts instead of the finger piece, as shown in the structure of Figs. 1 to 6. Fig. 8 is a detail vertical section taken on a line corresponding to line 88 of Fig. 7.

Referring to the drawings, the casing of my improved lock preferably consists of a front or face casing plate 1, having a flange 2 on its forward edge, the flange 2 being Specification of Letters Patent.

Application filed November 20, 1909.

Patented Oct. 18, 1910.

Serial No. 529,100.

slotted at 3 to receive the engaging members 4 of the bolts 5. These engaging members 4 project laterally from the bolts through the slot 3, as stated. The bolts are arranged to slide upon each other, each bolt being preferably cut away, as at 6, to receive the other.

Bent actuating levers 7 and 8 are provided for the bolts, the levers being oppositely disposed and pivoted at their angles, the posts or pivot studs 9 being preferably formed on the front casing plate, as clearly appears in Fig. 5. The outer arms of these levers engage the notches 10 in the bolts. The inner arms of the levers are preferably cut away, as shown in the drawing, each to receive the other. These levers are connected with a pin and slot connection, one of the levers being provided with a pin 11 and the other with a slot 12 to engage the pin, so that they are simultaneously actuated. One of the levers is preferably provided with a finger piece 13, which may be engaged through the opening 14 in the casing plate 1. The edge of this opening is preferably provided with an inwardly projecting guard flange 15 (see Fig. 5).

The bolts are actuated through the spring 16 which is preferably arranged to engage the lever 7 at one end, its other end being engaged on the spacing lug or member 17 The rear casing plate 18 is secured by means of screws 19, which engage the lever posts or pivots 9. This plate retains the parts in their assembled position, and is preferably provided with a pair of lugs 20 which co-act with casing plates and the flange 2 in supporting the bolts and in forming a way therefor. This plate 18 is preferably provided with key openings 21 through which either of the bolt-actuating levers may be engaged, so that the bolts are released on one side through the finger opening and on the other by means of a key.

The keeper 22 is provided with a slot adapted to receive the engaging members of the bolt, as clearly appears in Fig. 1. The keeper and the lock are shown mounted on door casing and door shown in conventional form to illustrate their position in use. 7

In the modified structure shown in Figs. 7 and 8, the bolts are actuated through a knob 23, the spindle 24 of the knob being provided with a cam 25 arranged to act on one of the levers.

My improved lock is very simple in its parts and the parts are readily assembled.

hen the lock is engaged with the keeper, it is quite impossible to disengage the same except through the key or the usual means; that is, a door cannot be disengaged by manipulation of the door, as by raising or lowering the same, as is frequently the case in looks in use on such doors as sliding doors for elevators and the like. i

I have illustrated and described my improvements in detail in the form in which I have embodied the same. I am, however, aware thatthe same may be considerably modified in structural details without de parting from my invention, but as such modifications will readily appear to those skilled in the art to which this invention relates, I do not attempt to point out the same specifically herein.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. The combination with a casing plate, having a finger opening therein and a slotted flange at its forward edge, of a pair of bolts having oppositely-facing, laterally-projecting engaging members arranged through said slot in said casing plate flange, said bolts slidably arranged upon each other, each being cut away to receive the other; a pair of oppositely disposed bent operating levers for said bolts, said levers being connected with a pin and slot connection, each lever being cut away to receive the other, one of said levers being provided with a finger piece adapted to be engaged through said finger opening in said casing plate; an

actuating spring for said bolts arranged to' act on one of said levers; and a casing plate having plate spacing members thereon arranged to coact with the casing plates and flange in retaining said bolts and forming a way therefor, said last-named casing plate having key openings therein arranged to permit the engaging of either of said levers with a key.

2. The combination with a casing plate, having a finger opening therein and a slotted flange at its forward edge, of a pair of bolts having oppositely-facing, laterally-projecting engaging members arranged through said slot in said casing plate flange, said bolts slidably arranged upon each other, a pair of oppositely disposed bent operating levers for said bolts, said levers being connected with a pin and slot connection, one of said levers being provided with a finger piece adapted to be engaged through said finger opening in said casing plate; an actuating spring for said bolts arranged to act on one of said levers; and a casing plate having plate spacing members thereon arranged to coact with the casing plates and flange in retaining said bolts and forming a way therefor, said last-named casing plate having key openings therein arranged to permit the engaging of either said levers with a key.

3. The combination with a casing plate, having a finger opening therein and a slotted flange at its forward edge, of a pair of bolts having oppositely-facing, laterallyprojecting engaging members arranged through said slot in said casing plate flange, said bolts being slidably arranged upon each other, each being cut away to receive the other; a pair of oppositely disposed bent operating levers for said bolts, said levers being connected with a pin and slot connection, each lever being cut away to receive the other, one of said levers being provided with a finger piece adapted to be engaged through said finger opening in said casing plate; an actuating spring for said bolts.

4. The combination with a casing plate, having a finger opening therein and a slotted flange at its forward edge, of a pair of bolts having oppositely-facing, laterallyprojecting engaging members arranged through said slot in said casing plat-e flange, said bolts being slidably arranged upon each other, a pair of oppositely disposed bent operating levers for said bolts, the opposedends of said levers being connected with a slidable connection, one of said levers being provided with a finger piece adapted to be engaged through said finger opening in said casing plate; an actuating spring for said bolts.

5. The combination with the casing of a pair of bolts having oppositely-facing, laterally-projecting engaging members projecting' from said casing; and a pair of oppositely-disposed bent actuating levers for said bolts, the opposed ends of said levers being connected with a slidable connection, one of said levers being provided with a finger piece.

6. The combination with a casing plate having a slotted flange at its forward edge, of a pair of bolts having oppositelyfacing, laterally-projecting engaging members arranged through said slot in said casing plate flange, said bolts being slidably arranged upon each other; a pair of oppositely-disposed bent" actuating levers for said bolts'the opposed ends of said levers being connected with a slidable connection; an actuating spring for said bolts; and a. second casing plate having spacing members thereon arranged to coact with the first named casing plate and flange in retaining said bolts and forming a way therefor.

7. The combination with a casing of a pair of bolts slidably arranged upon each other and having oppositely-facing, laterally-projecting engaging members projecting from said casing; and a pair of oppositely-disposed bent actuating levers for said bolts, the opposed ends of said levers my hand and seal in the presence of two being connected with a slidable connection, Witnesses.

one of said levers loein provided with a finger piece, said casing having key open- FOUNTAIN PURDHAM 5 ings therein arranged to permit the engavgelvltnesses:

ment of either of said levers With a key. I. W. SoHRAM,

In Witness whereof, I have hereunto set M. W. WENTWOR'lI-I. 

